Had rhinoplasty 5 days ago, have been on keflex post op, preventative measure. having horrible stomach issues from antibiotic. can i stop 2days early?

Let your doc know: It's totally understandable to stop the antibiotic if you can't tolerate it at all. However, before you do, let your prescribing doctor know what is happening. Since it's for prevention of infection, it shouldn't be a problem since the risk of complications from Vomiting likely outweighs its benefits.

Perioperative abx: For most surgical procedures, we give one dose of abx before surgery and two doses after surgery. Unless the surgeon had strong reasons for being concerned about infection, it is probably OK to stop it after 5 days. for most situations such as this one, we do NOT have good evidence that use of abx for certain numbers of days (5 is better than 3 or 7 is better than 5 days).

Rhinoplasty: You need to discuss this issue with your surgeon. If you have any packing or splints in your nose, there is a theoretical risk of developing toxic shock syndrome.

Call surgeon: The Keflex is not likely causing your nausea but if you call your surgeon, it is likely that you may be able to discontinue the antibiotics.